* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
h1{
    text-align: center;
    margin-top: 50px;
    
}
.box {
    width: 1400px;
    display: flex;
    margin: 100px auto;
    justify-content: space-evenly;
}

.zz {
    width: 200px;
    height: 200px;
    background-color: skyblue;
    font-size: 20px;
    text-align: center;
    line-height: 200px;
    color: black;
    background: linear-gradient(90deg, #03a9f4, #f441a5, #ffeb3b, #03a9f4);
    background-size: 400%;
    text-transform: uppercase;
    border-radius: 50px;
    border: #fff;
    z-index: 1;
}
.zz:hover {
    animation: sun 8s infinite;
}

@keyframes sun {
    100% {
        background-position: -400% 0;
    }
}

